Typewriting machine



Feb, 17, 1925.

c. B. coRcoRAN TYPEWRI TING MACHINE Filed March 24, 1924v Patented Feb. 17, 1925D i unirsey srA'rss PATENT OFFICE.

CORNELIUS B- CORCORAN, DECEASED, LATE OF'NEW YORK, `'Y'.yBY MICHAEL J. CO'RCORAN', ADMINISTRATOR, OF NEW YORK, N. Y., ASSIGNOR TO UNDERWOOD TYPEWRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION 0F DELAWARE.

'rrrawnrrme MACHINE.

Application med March 24, 1924. Serial No. 701,398. I

To all 'whom t may concer/c:

Be it known that CORNELIUS B. CoRcoRAN, deceased, late a citizen of the United States, and late residing in the borough of Bronx,

county of Bronx, city vand State of New.

York, inventedv certain new and useful llmprovements in Typewriting ,Machines of which the following is a specification.

`This invention relates to improvements in typewriting machines, particularly to type-bar cushions for the purpose of reducing the noise created by the impact of the type-bars against the stop-ring when operating the machine.

One of the objects of the invention is to improve and simplifyK the construction of type-bar cushions to make them more eilicient and durable. N

Other objects are to facilitate the assembling of the parts 'of the type-bar cushion, to secure the parts against accidental 'displacement or loss, and to make the sundry parts thereof readily displaceable' when worn out.

Other features and advantages will hereinafter appear.' v

In the accompanying drawings,

Figure 1 is a front view in elevation, showing one form ofthe improved typebar cushion in position on the type-segment' which is shown as situated below and forv wardly of the platen, which 'is diagrammatically illustrated with one of the typebars in contact therewith.

Figure 2 is a vertical section on Qthe line 2--2 of Figure 1, looking from left to right, and showing also a diagrammaticillustration of the platen and a typebar in twoy positions, to wit: in its normall position before it is actuated by the operator. and in its operative position when it is brought with the type thereoninto contact with the platen.

Fi re 3 is an enlarged view, mainly in section, of the type-bar cushion and typesegment as shown in Figure 2, and alsoA showing a detached'section of the connection of the stop-,ring of said cushion with springs at the rear of the type-segment.

Figure 4 is a vertical sectionl en ,fthe'line 4--4 of Figure 3 across the bolts of theA stop-ring of the type-bar cushion, looking from right to left, and showing the springs and lock-nuts in elevation.

Figure 5 is a front view in elevation of a modified form of the type-bar cushion, shown as connected to .the type-segment.

Figure 6 is a section on the line 6 6 o-f Figure 5, looking` in lthe direction of the arrows. l

11 designates the platen of a typewriting machine of the Underwood type, and 12 the shaft thereof, which is shown in crosssection in Figure 2.

To provide a cushion for the type-bars 13, in the form of the type-bar cushion shown in Figures 1 to Ll, inclusive, a groove 15 is formed in the front face of the typesegment 16, which is shown in Figure 2 as having therein the pivots 31 for connecting the type-bars 13 'theretoto, receive a lining 17, which is preferably channelv shaped, as shown in Figures 2 and 3, and which is preferably made of felt; but it may also be made of some shock-absorbing material other than felt.

The longitudinal outline of the groove 15 and lining 17 is shown in Figure 1 as that of an arc of a circle concentric with the Figures 2 and 3. The core 19 preferably l consists of lead with which said tube 18 may be filled; but some plastic lmetal-or material other'than lead may be employed to fill the outer tube 18 if desired. v l

The rear wall of the tube 18 vserves to distribute the shock received by the stop-ring 1,8-19 over a large'area of the lining 17.

lThe front wall of the tube 18 serves asa resilient medium to receive the impact from the type-bars A13 and transmit the same to the lead core 19, whichis provided for the purpose of `f deadening the noise of the impactofthe type-bars 13 against the'tube 18.

To gently hold said stop-ring 18--19 against the lining 17 iny said groove 15, the

tube 18v is provided on the rear thereof with stud-bolts or rivets 20, which pass through bolt-holes 21 in the segment 16 and are connected to slotted springs 22 by means of lock-nuts 23.

Said springs 22 are shown in Figures 2 and 3 as secured to the type-segment 16, at

vthe rear thereof, by means of screws 24, and

, tapered, as shown in Figures 3 and 4. 'Ihe flat sides of said ends 26 are interlocked with the sides of the slots 25 in said springs 22, whereby the nuts 23, 26 are kept from rotating and getting loose on the bolts 20.

steel Eor some other resilient-metal.

The taper on the flat sides of said ends 26 serves'to facilitate the/adjustment of said ends 26 in position in said slots 25.

To remove the stop-ring 18-19 for inspection or renewal, the upper ends of the springs 22 may be deflected` by hand to release the lock-nuts 23, 26, which may then be removed fromthe bolts 20, which may then in turn be removed from the bolt-holes 21, thereby removing the stop-ring 18-19 from said lining or seat 17 in the groove 15.

In the modification of the type-bar cushion shown in Figures 5 and 6, the stopring 28-29 consists ofthe channel-shaped member 28, which is preferably made of It is shown as secured to the segment 16, which is shown in Figure 6 as having therein the pivot 31 for the type-bars, by means of the screws 30, and it has a filling 'of lead 29 enclosed between the concave part thereof and the front face of said segment. front wall 28a of the stop-ring 28-29 serves to intercept the type-bars of the typewriting machine and to check the impact of the same; and the lead filling 29 in the rear of said wall serves to deaden the noise of the impact.

The modification shown in Figures 5 and 6 is evidently very simple and inexpensive.

Variations may be resorted to within the scope of the invention, and portions ofthe improvements may be used withoutothers.

Having thus described the invention, I

claim 1. Ina typewriting machine,the combination of a platen, a type-segment, typebars pivotally connected to thel segment in position to strike the platen, and a typebar cushion, comprising a groove in the front face of the segment, a channel-shaped lining of shock-absorbing material in said groove, and a stop-ring having its rear part 1mbedded in said lining in said groove and its front part extending forwardly of said segment to intercept the type-bars and check theimpact thereof. l

2. In a typewriting machine, the combination of a. platen, a type-segment, type- -bars The pivotally connected to the segment in posltion to strike the platen, and a typebar cushion, comprising a groove in the front face of the segment, and a channelshaped liningof shock-absorbing material in said groove, combined with a stop-ring, consisting of a tube of resilient metal lled with plastic metal, said stop-rin 4having its rear part imbedded in said said groove and its front part extending forwardly of the segment to intercept the type-bars and check the impact thereof.

3. In a typewriting machine, the combination of a platen, a type-segment, typebars pivotally connected to said segmentin position to strike the platen, and a typebar cushion, comprising a groove in the front face of said segment, and a channelshaped lining of` shock-absorbing material in saidl groove, combinedi with a Vstop-ring consisting of a steel tube filled with lead, said stop-ring having its rear part imbedded in said lining in said groove and its front part extending forwardly of the segment to intercept the type-bars and check the impact thereof.

4. Ina typewriting machine, the combination of a platen, a type-segment, typebars' pivotally connected to said segment in position to strike the platen, and a typebar cushion, comprising a groove in the front face `of the segment, and a channelshaped lining of shock-absorbing material in said groove, combined with a stop-ring consisting of a fiat-sided tube of resilient metal filled with plastic metal, said stopring havingl its rear part imbedded in said lining in said groove and itsy front part extending forwardly of said segment tol i vlining of felt in said groove, and a stopring having its roar part imbedded in said lining in said groove and its front part extending forwardly of said segment to intercept the .type-bars and check the impact thereof.

6. In a typewriting machine, the combination of a platen, a type-segment, typebars pivotally connected to said segment in position to strikethe platen, and a type-bar cushion, comprising a groove in the front face of said segment, a lining of shock-absorbing material in said groove, and a st6pring having its rear part imbedded in said lining in said Vgroove and its front part 'extending forwardly of said segment to intercept t e type-bars and check the impact thereof, combined with suitable springs for bar cushion, comprising a groove in the gently holding said stop-ring against said liningl in said groove. 7. In a typewriting machine, the combination of a platen, a type-segment, typebars pivotally A connected to said segment in position to strike the platen, and a typefi'ont face of said segment, a lining of shockabsorbing material 1n said groove, and a stop-ring having its rear part imbedded in' said lining in said groove and its front part extending forwardly of said segment to intercept the type-bars and check the impact thereof, comblned with rearwardly-extending bolts o-n said sto -ring, and springs situated at the rear o said segment, said springs `drawing on said bolts, thereby gently holding said stop-ring against said lining in said groove'.

S. In a typewriting machine, the combination of a platen, a type-segment, typebars pivotally connected to said segment in vposition to strike the platen, and a type-bar cushion, comprisingva groove in the front face of said segment, 4a lining of shock-absorbing material in said groove, and a stopring having its rear part imbedded in said lining in said groove and its front part ex;

- tending forwardly of said segment to intercept the type-bars and check the impact thereof, combined with rearwardly-extending bolts on said stop-ring, suitable nuts on said bolts, and plate s rings situated at the rear of the segment an pressing rearwardly against said nuts, there y drawing on said bolts to gently hold said stop-ring` against said lining in said groove. e

9. In a typewriting machine, the combination of a platen, a type-segment, type-bars pivotally connected to said segment in position to strike the platen, and a type-bar cushion, comprising a groove in the front face of said segment, a lining of shock-absorbingmaterial in said groove, and a stoprmg having its rear part imbedded 1n said lining 1n said groove, and its frontpart extending forwardly of said segment to inter- A- -cept the type bars and check the impact bolts, plate springs situat thereof, combined with rearwardly-extending bolts on said stop-rin nuts on said at the rear of the segment and pressing rearwardly against the nuts, thereby ndrawing on said bolts to gently hold said stop-ring against saidlining in said groove, slots in said springs, and

flat sides on partsvof said nuts to interlock with said slots to prevent accidental displacement of said nuts.

10. In a typewritin-g machine, the' combination of a platen, a type-se bars pivotally connected to sai segment in ent, typeposition to strike the platen, and a type-bar Vcushion conprising a groove in the front segment, a lining of shock- A face of sai absorbing material in said groove, and a stop-ring having its rear part imbedded in said lining in said groove and its front part extending forwardly of said segment to intercept the'type-bars and check the impact thereof, combined with rearwardlyextend- .ing bolts on said stop-ring, nuts on said` bolts, plate springs situated at the rear of the segment and pressing rearwardly against said nuts, thereby drawing on said bolts to gently hold said stop-ring against said 1ining in said groove, slots in said springs, fiat sides on parts of said nuts to interlock with said slots to prevent accidental displacement of said nuts, and bevels on said fiat sides to facilitate the adjustment of said sidesand said lslots.

11. In a typewriting machine, the combination of a platen, a type-segment, typebars pivotally connected thereto in position to strike the platen, and a type-bar cushion, e

comprising a groove in the front face of the segment and a stop-ring consisting of a' tube of resilient metal filled with a plastic metal, said stop-ring having its rear part imbedded in said groove and its front part extending forwardly of the segment to intercept the type-bars and check the impact thereof.

12. In a type-bar cushion of a typewriting machine containing a platen, a type-segment and type-bars, a stop-ring consisting of a tube of resilient metal filled with a plastic metal, said stop-ring extending forwardly of said segment to interceptmthe type-bars and check the impact thereof.

13. In a type-bar cushion of a typewritingniachine containing a platen, a typesegment and type-bars,a stop-ring containing a front wall of resilient metal and a filling of plastic metal in the rear of said wall, said stop-ring extending forwardly of forwardly of said segment to in? 

